package com.basic.list;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.Hashtable;

public class Test {

	public static void main(String[] args) {
		ArrayList<String> list = new ArrayList<>();
		list.add("test");
		list.remove(0);
		HashSet<String> set = new HashSet<>();
		set.add("");
		Hashtable<String, String> hashtable = new Hashtable<>();
		hashtable.put("", "");
	}
}
